| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light control unit capable of efficiently utilizing diffused light. <P>SOLUTION: The light control unit includes a first diffusion sheet wherein a diffusion angle is periodically changed along a prescribed direction in a sheet surface when light is made incident vertically on the sheet surface and a second diffusion sheet wherein a diffusion angle A in a first direction in which the diffusion angle shows the maximum value and a diffusion angle B in a second direction vertical to the first direction in the sheet surface are different from each other when light is made incident vertically on the sheet surface. <P>COPYRIGHT: (C)2010,JPO&INPIT |
